Chronograph



( Model.) 3 Sheets-Sheet l.

J..KARR.

GHRONOGRAPH. Q 1

No. 266,162. Patented O0t.17, 1 882.

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(ModeL) 3 Sheets-Sheet 2.

6 J. KARR.

GHRONOGRA-PH. No. 266,162. Patented 00t.17. 1882.

(ModeL) 3 Sheets-Sheet) 3.

JQKARR.

GHRONOGRAPH.

No. 266,162. Patented Oct. 17, 1882..

UNITED STATES PATENT OFFICE.

JACOB KARE, OF \VASHINGTON, DISTRICT OF COLUMBIA.

CHRONOGRAPH.

SPECIFICATION forming part of Letters Patent No. 266,162, dated October1'7, 1882,

Application filed June 23, 188-2.

To all whom it may concern:

BeitknownthatLJAGOB KARRmFWashington,in the District of Golumbia,haveinvented certain new and useful Improvements in Time Mechanism; and I dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,making a part of this specitication, in which- Figure 1 is a frontelevation of my clock as arranged for use. Fig. 2 is a perspective viewfrom the front of the movement separated from its case. Fig. 3 is anenlarged front elevation of the same. FigAEis an enlarged perspectiveview of the escapement separated from its connecting mechanism. Fig. 5is a rear elevation of said movement. Fig. 6 is a perspective view ofthe outer end of the center arbor and its attachments separated fromeach other. Fig. 7 is a like view of the same combined, and Fig. 8 is acentral longitudinal section of said parts.

Letters of like name and kind refer to like parts in each of thefigures.

The design of my invention is to enable seconds and quarter-seconds tobe indicated and recorded for timing purposes in a simple andinexpensive manner; and to this end it consists principally in the meansemployed for operating the quarter-seconds hand, substantially as andfor the purpose hereinafter specified.

- It consists, further, in the means employed for producing a pressureupon the quarter-sec onds escapement, substantially as and for thepurpose hereinafter shown.

It consists, further, in the means employed for relieving thequarter-seconds escapement from undue pressure of themaintaining-spring, substantially as and for the purpose hereinafter setforth.

It consists, further, in the means employed for operating the marker,substantially as and for the purpose hereinafter shown and described.

It consists,further, in a clock in which the ordinary minutes and hourshands are located below the center of the dial, and are driven directlyby the second arbor, substan tiall y as and for the purpose hereinafterspecified.

It consists, further, in a clock in which the (Model) ordinary minutesand hours hands are placed below the center of the dial, andasupplemental minutes hand is located at the center of said dial, andeach is driven directly or through dial-wheels by the second arbor,substantially as and for the purpose hereinafter shown.

In the annexed drawings, A represents the front plate, and B the backplate, of my movement, which are connected together at their corners andheld in relative parallel positions by means of posts 0 in the usualmanner.

Journaled at one side of the frame is the first arbor, D, which isprovided with aspriug, d, and wheel (1, the latter being connected withsaid arbor by a ratchet-wheel and pawl in the usual manner. Below and atthe transverse center of the frame is the second arbor, E, whichreceives motion from the first arbor, D, which motion is imparted to athird arbor, F, that is located above and to the left of said arbor E. Afourth arbor, G, located at the cen ter of said frame, receives motionfrom said arbor F and imparts the same to an escapewheel arbor, H, whichis located above and to the left of the former. A pallet-arbor, I, andbalance-wheel arbor K complete the arbors of the train, each of which isprovided with the usual wheels, pinions, &c., and operates in theordinary manner. The second arbor, E, has heretofore been located at thecenter of the train, but is now moved to a lower point in order that anarbor for a sweep seconds-hand may occupy such position. Said arbor E isconnected with its wheel and pinion by the usual friction mechanism,which permits the former to be rotated within the latter for the purposeof setting minutes and hours hands L and M, respectively, which aredriven inthe usual manner by the projecting end of said arher, with theaid of ordinary dial-wheels, Nand O. The center arbor, G, projectsbeyond the front plate, A, and receives a sweep secondshand, P, which isadapted to indicate upon a properly-divided circle, q, upon the outerport-iom of a dial, Q, seconds and quarter-seconds. Said arbor, like thesecond arbor, E, is connected with its wheel and pinion by friction, andmay be turned within the same for the purpose of setting said hand P.The projecting end of thearborG passes through abridge,

R, upon which is provided a sleeve, 1', that encircles said arbor andfurnishes a bearing for and upon which is journaled a pinion, S, thatengages with and receives motion from the dial-wheel O. Said pinioncarries a hand, '1, which is caused to move around the dial Q, once eachhour, and to indicate minutes upon a suitably-divided circle, 1.

The minutes and hours hands L and M are comparatively short, in orderthat they may not interfere with the center arbor, and are provided uponthe dial Q with a suitably-divided circle,Q upon which they indicateminutes and hours in the usual manner. It will thus be seen that by myarrangement of the train the usual minutes and hours hands,with aseparate dial, are provided, and that in addition theretolprovide anextra minute-hands and a sweep seconds-hand, with dials for each.

While quarter-seconds are marked by the hand I, for many purposes anindependent hand would be desirable for such purpose, and such isprovided as follows, viz: An arbor, U, corresponding to the escape-wheelarbor H, is placed horizontally opposite to the same, and is providedwith a pinion thatcorresponds to the pinion of said escape-wheel arbor,and in like manner is engaged by the wheel ot'the arbor G, the resultbeing that said arbors H and U are rotated in the same direction andwith the same'velocity. The end of the arbor U projects through thefront plate, A, and upon the same is journaled a wheel, V, and outsideof said wheel is secured a pinion or toothed carrier, to. A spring, a,is secured at one end upon the face of said wheel, near its periphery,and from thence extends spirally around said carrier, and at its innerend engages with the teeth of the same.

Journaled within the plate A and a bridge, R, is an arbor, X, upon whichis a pinion, m, that meshes with and receives motion from the wheel V,and afour-armed pallet,a", which engages with the teeth 9 of an extraescapewheel, Y, of ordinary form, that is secured upon the projectingend of the escape-wheel arbor H. Said supplemental escape-wheel Y hasjust twice the number of teeth of the regular escape-wheel. The springto acts as a maintaining-power, and causes the arms of the pallet x topress against the teeth of the supplemental eseape-wheel and to moveforward as soon as released by the rotation of the latter, and as thetrain is timed so that the balancewheel vibratesfour times each secondit will be seen that said pallet-wheelwill make one complete revolutionin said time, and that such revolution will be by four distinctmovements, each followed by a period of rest. A hand, x secured upon theend of the arbor X, outside of the dial Q, traverses a circle, upon thelatter, which circle is divided into four equal parlts, eachrepresenting one-quarter of a seconc In order that the spring a may notexert too much power upon the wheel V, its inner end is extendedoutward, as shown in Figs.2, 3, and 4, over a pin, a, that is securedwithin and projects from theface of said wheel a short distance from thepinion a in such position that if an undue pressureis exerted upon saidspring by said pinion said pin will act as a fulcrum and cause saidengaging end to be lifted out of engagement with said pinion, whichlatter will then move forward one tooth, and its next succeeding toothwill then engage with said sprin Should it be desired to stop the motionof the quarter-seconds hand a without stopping the train, thearrangementdescribed will permit such operation,the spring a beingcaused to trip over each tooth of the carrier u and at the same time tomaintain a sutlicient pressure upon the pallet wheel 00 to cause thelatter to instantly resume its movements when released.

The motion of the train is arrested by means of a bell-crank, Z, whichis secured upon an arbor, 2, that is journaled between the plates A andB, and is located with relation to the balance-wheel kso thatoneofthear1ns,z,ofsaid part Z may be moved into or out ofcontact with one sideof said wheel by the partial rotation of said arbor. The opposite arnnzof said stop Z is connected with a rod, A, which extends upward throughthe casing B and is furnished with a button, a, by means of which saidstop mechanism may be operated, as described.

Secured at one end to or upon the outer face at the short end of theseconds hand P is a marker, B which has the form shown in Fig. 6, and isconstructed of or from spring metal. The free end of said marker, whichextends nearly to the point of said hand P, is provided with an arm, bthat passes rearward toward the dial Q through an opening, 1), which isformed in said handle near its point. The normal position of the markerB is with its point I) standing away from the dial Q, and by moving saidmarker outward and then releasing it said point will be caused toimpinge sharply upon said dial and to mark the same, either by thetransfer of ink or by indentation.

The manipulation of the marker B is effected by means of thefollowing-described mechanism, viz: Journaled loosely upon the arbor Gisa sleeve, 0, which at its outer endis provided with an arm, 0, thatextends outward through an opening near the centerot' thehand P andbears against the rear face of said marker. Near its inner end thesleeve 0 is provided with a circumferential groove, 0 which is engagedby a lug, d that projects from the edge nearthelongitudinalcenterofaflatspring, D, which has one end secured upon the plate A, andat its opposite free end, (1 is twisted, so as to give its outer face atsuch point an upward and rearward inclination. A bar, E, securedvertically upon said plate andcapable of vertical motion thereon, isprovided atits lower end with a flat lug, e, which extends over thetwisted end d of said spring D and has the same inclination of itsfaces. The bar E is held at the upper limit of its motion by means of aspring, F, and when moved downward its lug 0 will engage with thetwisted end (1' of the spring I). and move the same and the sleeve 0rearward until it has passed out of engagement, when, upon beingreleased, said bar will move sharply to the upper limit of its motion,and by such movement press said sieeve and the hand P outward muchbeyond their normal-positions. As said lug 0 passes upward out ofengagement with said spring end d the rearward spring of said hand willcause its point to impinge sharply upon the dial Q and to mark the same,as before described. The upper end of the bar E projects through thecasing, and is furnished with a button, 0 by means of which it may bepressed downward to operate the marker.

v Having thus fully set forth the nature and merits of my invention,what I claim as new 1. As a means for opera-ting the quarter-secondshand 00 the supplemental escape-wheel V, and four-armed pallet 00, eachindependently driven in the mannerand forthepurposespecified.

2. In combination with the pallet-arbor X and four-armed pallet 00, thewheel V, journaled upon the arbor U and connected therewith by means ofthe spring u, substantially as and for the purpose shown.

3. The combination ofthe arbor X,provided with the toothed carrier 00,with the wheel V, journaled upon said arbor and provided with therelieving-pin c, and the spring a, secured to said wheel and adapted toengage with said carrier and pin, substantially as and for the purposeset forth.

4. In combination with the marker B, the sleeve 0, adapted to movelongitudinally upon the arbor G, and provided at its outer end with thearm 0 and near its inner end with the groove 0 the spring I), havingthelug d and twisted free end (1 the vertically-movable bar E, providedwith the inclined lug e, and the spring F, adapted to hold said bar atthe upper limit of its motion, substantially as and for the purposeshown and described.

5. A clock in which the ordinary minutes and hours hands are locatedbelow the center of the dial, and are driven directly by the secondarbor, to which said minutes hand is attached, substantially as and forthe purpose specified.

6. A clock in which the ordinary minutes and hours hands are placedbelow the center of the dial, and are driven directly by the secondarbor, and a supplemental minutes-h and is located at thecenter of saiddial, and is driven through dial-wheels bysa-id second arbor,substantially as and for the purpose shown.

In testimony that I claim the foregoing I have hereunto set my hand this22d day of June, 1882.

' JACOB KARE.

Witnesses:

GEO. S. PRINDLE, W. G. DUVALL.

